Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 166

10. Specifications
60 AVM - Pulse Width Modulation, 525 - 600 V
Illustration 10.17: Derating of I
at 600 V, using 60 AVM in Normal torque mode (110% over torque).
10.2.3. Derating for Low Air Pressure
The cooling capability of air is decreased at lower air pressure.
At altitudes higher than 2 km, please contact Danfoss regarding PELV.
Below 1000 m altitude no derating is necessary but above 1000 m the ambient temperature (T
accordance with the shown diagram.
10
Illustration 10.19: Derating of output current versus altitude at T
An alternative is to lower the ambient temperature at high altitudes and thereby ensure 100% output current at high altitudes.
166
for different T for enclosure E
out AMB, MAX
AMB, MAX
MG.20.M5.02 - VLT
SFAVM - Stator Frequency Asyncron Vector Modulation
Illustration 10.18: Derating of I
at 600 V, using SFAVM in Normal torque mode (110% over torque).
) or max. output current (I
AMB
. By altitudes above 2 km, please contact Danfoss regarding PELV.
®
is a registered Danfoss trademark
®
VLT AQUA Drive
Operating Instructions
for different T for enclosure E
out AMB, MAX
) should be derated in
out